The interview process for undergraduates is fairly standard compared to other consulting firms. There are two rounds of interviews. The first round consists of a behavioural interview and a case study type of interview, related to the type of work that ZS Associates is most famous for. The second round is a half day interview, with some time given to review a case and prepare some answers where you are quizzed on the details, an interview with a more senior Operations Research Associate to take you through some of the work they actually do, and interviews with managers and partners.